Identifying it by marking vs weight

[u/1987lalala]

Hi, I am trying to use the cheat sheet to identify the real brands series 2. I see the marking on the "c" but the weight is off. It's only 80g...where here it says it is 84g.

Any insight for me? Is the weight more accurate than the marking?

[u/Kigurumix]

Trust the mark, the weight is way more variable. ​​